JP5940269B2 - Fastening chuck - Google Patents

Description

The present invention relates to a clamping chuck in which a chuck body includes a taper-shaped centering hole whose diameter increases toward the tip, and a clamping member including a threading portion for clamping in the chuck body. .

  The clamping chuck is provided with a non-parallel shaft gear transmission mechanism, that is, a transmission mechanism in which the shafts of meshing gears are not parallel to each other. The non-parallel shaft / gear transmission mechanism includes a threaded ring. The threaded ring is meshed with a threaded part for fastening, cannot be displaced in the axial direction, and is mounted on the same axis as the fastening member. It is done. The threaded ring can be driven by a drive member that can rotate around a drive shaft that is not parallel to the chuck shaft.

  A clamping chuck of this kind is known, for example, from DE 10056729 A1. In this clamping chuck, in order to drive the chuck body via a non-parallel shaft / gear transmission mechanism, a hollow space is provided in the chuck body by a hole extending in a tangential direction with respect to the threading ring. Here, if the non-parallel shaft / gear transmission mechanism after wear is to be replaced, a great amount of labor is required to take out the components attached to the chuck body.

German patent application DE10056729A1

  One form of a clamping chuck as described above is described in the unpublished German patent application publication DE 10 2009 003802.7. In the tightening chuck of this form, a hole for a non-parallel shaft / gear transmission mechanism in the form of a hollow space is provided in the chuck body as in the case of the above-mentioned German patent application publication DE10056729A1. Therefore, it is difficult to provide such a hole. This is because it is necessary to realize a hollow space that provides sufficient space for the drive member of the non-parallel shaft / gear transmission mechanism and the threading ring.

  Further, none of the above-mentioned tightening chucks lacks the function of further fixing the position of the non-parallel shaft / gear transmission mechanism in the radial direction. In the drilling process, a very strong centrifugal force acts on a member that is not directly arranged on the chuck shaft, which causes a problem.

  An object of the present invention is to configure the tightening chuck as described at the beginning as follows. That is, it is provided with a non-parallel shaft / gear transmission mechanism that can be fixed in the radial direction, and is to realize a structure as simple as possible from the viewpoint of manufacturing technology.

  According to the present invention, this problem is solved by the following transmission mechanism outer cylinder. That is, it is a transmission mechanism outer cylinder that is coaxially arranged on the chuck shaft and has an opening for a drive tool, so that the non-parallel shaft / gear transmission mechanism in the transmission mechanism receiving portion cannot be displaced in the radial direction. Solved by what to fix.

  Such a structure is linked to the following advantages. Although the non-parallel shaft / gear transmission mechanism is in the transmission mechanism receiving portion, the transmission mechanism receiving portion is surrounded by a transmission mechanism outer cylinder having an opening for a drive tool. This transmission mechanism outer cylinder prevents the non-parallel shaft / gear transmission mechanism from becoming dirty, and keeps the non-parallel shaft / gear transmission mechanism in a mounted state. Further, such a transmission mechanism receiving portion can be manufactured very easily in terms of manufacturing technology. For example, it is not necessary to make a hollow body from a material (solid material). With such a structure, the tightening chuck becomes very slim.

It is a longitudinal cross-sectional view of the clamping chuck by this invention. It is a longitudinal cross-sectional view of the clamping chuck of one modification. It is the fragmentary sectional view seen from the front end side about the clamping chuck | zipper of FIG. It is a figure corresponding to Drawing 1 about a tightening chuck of one modification. It is a figure corresponding to FIG. 1 about the clamping chuck | zipper of the further another modification. It is a perspective view of a collet. It is a figure corresponding to FIG. 6 about the other Example of this invention.

  The transmission mechanism receiving portion is provided as a transmission mechanism recess. In particular, if the transmission mechanism receiving portion or the transmission mechanism concave portion is recessed in a direction perpendicular to the chuck shaft, that is, in the radial direction, a mouth frame member (a member attached to the spindle, or the spindle It is advantageous to provide a part of If it does in this way, when forming a mouth frame member, the hole for forming the receiving part for transmission mechanisms can be provided very easily. In the following manner, it is also advantageous to dispose the non-parallel shaft / gear transmission mechanism in the vicinity of the mouth frame member. That is, it is advantageous to dispose the non-parallel shaft / gear transmission mechanism close to the mouth frame member as long as the non-parallel shaft / gear transmission mechanism is disposed at a considerable distance from the receiving position of the tool. By arranging in this way, the degree to which the tool is contaminated with foreign particles can be reduced.

  Further advantages can be obtained if the transmission mechanism outer cylinder and the mouth frame member are provided as an integral member. During production, the production step of one component is omitted. According to another preferred embodiment of the tightening chuck, the transmission mechanism concave portion surrounded by the transmission mechanism outer cylinder is formed integrally with the chuck body. In this case as well, the number of members or portions of the clamping chuck to be manufactured is reduced, so that one manufacturing step is omitted. Further, if the transmission mechanism outer cylinder and the chuck body are implemented as an integral member, the non-parallel shaft / gear transmission mechanism is prevented from being unnecessarily contaminated during the drilling process.

  According to a particularly preferred embodiment of the clamping chuck, the transmission mechanism outer cylinder is detachably attached to the chuck body. In such a case, assembly, maintenance, and cleaning of the non-parallel shaft / gear transmission mechanism are facilitated. This is because the visibility of the drive member, the threaded ring, and the recess for the transmission mechanism is good in the state where the outer cylinder for the transmission mechanism is removed.

  Further, it is preferable that the axially extending portion of the transmission mechanism outer cylinder partially or completely surrounds the chuck body and / or the mouth frame member (that is, at least one of them). Even in this case, contamination of the non-parallel shaft / gear transmission mechanism is reduced.

  If the outer cylinder for the transmission mechanism is flanged inward in the radial direction at the end opposite to the centering hole, the threaded ring will be fixed more firmly so that it will not move in the axial direction. Can be reliably realized. Thereby, the position shift of the opening part for drive tools also reduces.

  The non-parallel shaft / gear transmission mechanism is advantageously formed as a bevel gear transmission mechanism with a bevel gear as the drive member. By using the bevel gear transmission mechanism, the recessed portion or the receiving portion for the gear transmission mechanism can be implemented by being arranged in various directions. The non-parallel shaft / gear transmission mechanism may be formed as a worm gear transmission mechanism provided with a worm gear as a drive member.

  In another advantageous embodiment, the frame member is formed integrally with the tool spindle. In this case, chuck exchange between various fastening chucks can be performed very easily. As a result, operations on the workpiece can be reduced.

  An embodiment of the invention in which the clamping member is formed as a collet is advantageous. By being formed as a collet, the following is reliably realized. In other words, it is ensured that the tool is securely surrounded so that it cannot be removed by hand.

  If the collet has a flange-like or rail-like overhang on its outer wall axially spaced from its end, the collet is better guided in the chuck body and non-parallel Useful for shielding dust and dirt on shaft and gear transmission mechanisms. Further, if the collet has a collar-shaped ring portion or a cylindrical portion that can be inserted into the mouth frame member at the end portion on the side of the mouth frame member, the ring portion or the cylindrical portion is also guided, Useful for dust and antifouling shielding. If the threading length of the tightening threaded part exceeds the length of the thread of the threading ring meshing with the tightening threaded part, the above dust-proof / antifouling A shielding action is also obtained.

In the drawings, the clamping chuck 1 is depicted in FIGS. The tightening chuck 1 includes a frame member 12 for mounting on a spindle and a chuck body 3 assembled thereto. In the example shown in the drawing, a screw cutting for screwing the spindle to the spindle is provided in the frame member 12. Parts are provided. A chuck main body 3 provided in the clamping chuck 1 is provided with a tapered centering hole 2 having a diameter increasing toward the tip. A tightening member 5 is disposed in the centering hole 2. The tightening member 5 includes a tightening threaded portion 4 at an end on the side of the mouth frame member 12, and a threaded ring 7 meshes with the tightening threaded portion 4. The threading ring 7 is not displaceable in the axial direction in the chuck body 3 and is attached coaxially (coaxially) to the fastening member 5. Here, the fastening member 5 is formed as a collet 18 with a slit. This slit can be filled with rubber for the purpose of preventing the entry of dust and contaminants. The threading ring 7 is a part of a non-parallel shaft / gear transmission mechanism 6 having a drive member 8, and the drive member 8 is disposed in the recess 11 for the transmission mechanism. A transmission mechanism outer cylinder 10 is provided coaxially with the chuck shaft at the location of the transmission mechanism recess 11. The transmission mechanism outer cylinder 10 holds the non-parallel shaft / gear transmission mechanism 6 in a predetermined position, and prevents dust and contaminants from entering. The transmission mechanism outer cylinder 10 is formed with an opening 9 for a driving tool. According to the specific example of FIG. 1, the transmission mechanism recess 11 is provided to be recessed in a direction perpendicular to the chuck shaft, that is, in the radial direction. Specifically, the recessed portion that receives the drive member 8 is recessed from the outer wall and is provided only at a specific portion in the circumferential direction, and the recessed portion that receives the threaded ring 7 is formed as a recessed portion from the inner wall over the entire circumference. Provided. In the embodiment of FIG. 1, the non-parallel shaft / gear transmission mechanism 6 is provided as a bevel gear transmission mechanism 13, and the bevel gear transmission mechanism 13 has a bevel gear as a drive member 8 and a threaded portion on the inner surface side. And an attached threading ring 7 having a gear cutting portion on the upper surface side. Here, the non-parallel shaft / gear transmission mechanism is provided in the mouth frame member 12. The threading ring 7 meshes with the tightening threaded portion 4 of the tightening member 5. Here, the tightening member 5 is formed as a collet 18, and an outer wall of the collet 18 is provided with an overhanging portion 19 that protrudes outward in the radial direction. The overhang portion 19 is provided at a location spaced from the end of the collet 18 at a predetermined interval in the axial direction. In the specific examples shown in FIGS. 6 to 7, the overhang portion 19 has a ring shape extending over the entire circumference. That is, it is a flange shape or a rail shape.

  FIG. 2 shows a modification in which the transmission mechanism outer cylinder 10 and the mouth frame member 12 are integrally formed. In the example shown in FIG. 2, the non-parallel shaft / gear transmission mechanism 6 is embodied as a worm gear transmission mechanism 15 and includes a worm gear 16 as the drive member 8. Here, as in FIG. 1, the transmission mechanism recess 11 is provided on the side of the mouth frame member 12.

  FIG. 3 is a front view of the clamping chuck of FIG. 2 as viewed from the front end side, and is a partial cross-section so that the non-parallel shaft / gear transmission mechanism 6 formed as the worm gear transmission mechanism 15 can be seen well. It is illustrated. This figure depicts how the drive member 8 and the threaded ring 7 are engaged. Further, in this figure, an opening for the driving tool 9 provided on the wall of the mouth frame member 12 is shown.

  FIG. 4 shows a modification of the arrangement of the transmission mechanism recess 11 in the chuck body 3. In this example, the non-parallel shaft / gear transmission mechanism 6 is formed as a bevel gear transmission mechanism 13 as in the case of FIG. FIG. 4 shows an embodiment in which the transmission mechanism outer cylinder 10 is flanged inward at the end opposite to the centering hole 2. As in FIG. 1, the fastening member 5 is formed as a collet 18, and the outer wall of the fastening member 5 is a flange-like or rail-like tension on the entire circumference at a location spaced from the end of the collet 18. An exit 19 is provided. The tightening threaded portion 4 has a length that exceeds the length of the thread of the threaded ring 7 that meshes with the tightening threaded portion 4.

  FIG. 5 shows a modification of the present invention corresponding to FIG. In this modification, the transmission mechanism outer cylinder 10 is provided in the chuck body 3, and the transmission mechanism outer cylinder 10 and the chuck body 3 are provided as one common component. Similarly, the non-parallel shaft / gear transmission mechanism 6 is implemented by a bevel gear transmission mechanism 13, and the fastening member 5 is implemented by the same example form as in FIG. 1. A joining member (in the illustrated example, a screw) holds the chuck body 3 and the mouth frame member 12 at a fixed position.

  FIG. 6 shows the fastening member 5 formed as a collet 18. In FIG. 6, it can be clearly seen that the overhang 19 is provided on the outer wall of the collet with an axial spacing from the end of the collet. Also shown is a slot 17 for preventing rotation. According to the example shown in FIG. 6, the tightening threaded portion 4 in the tightening member 5 extends to the end of the tightening member 5 on the side of the mouth frame member 12.

  In FIG. 7, the tightening threaded portion 4 does not extend as much as in FIG. 6, and a collar-shaped ring portion 20 is formed at the end on the mouth frame member 12 side. It can be inserted into the frame member 12.

1 Chuck 2 Centering hole 3 Chuck body
4 Tightening screw cutting part 5 Tightening member 6 Non-parallel shaft / gear transmission mechanism
7 Thread ring 8 Drive member 9 Drive tool opening
DESCRIPTION OF SYMBOLS 10 Transmission mechanism outer cylinder 11 Transmission mechanism recessed part 12 Mouth frame member
13 Bevel gear transmission mechanism 14 Bevel gear 15 Worm gear transmission mechanism 16 Worm gear 17 Long hole 18 Collet
19 Flange-shaped overhang 20 Color-shaped ring

Claims (13)

A chuck body (3) provided with a taper-shaped centering hole (2) whose diameter is expanded toward the tip;
A mouth frame member (12) assembled to the chuck body (3) from the side of the tool spindle;
A tightening member (5) having a threaded portion (4) for tightening and disposed in the chuck body (3);
A non-parallel shaft / gear transmission mechanism (6) formed as a bevel gear transmission mechanism (13);
A transmission mechanism recess (11) provided in the vicinity of a position where the frame member (12) and the chuck body (3) are assembled to each other;
A transmission mechanism outer cylinder (10) provided coaxially with the chuck shaft and provided with an opening (9) for the drive tool;
Non-parallel shaft / gear transmission mechanism (6)
A threaded ring (with a threaded part engaged with the tightening threaded part (4) on the inner surface side, which cannot be displaced in the chuck axis direction, and is mounted coaxially with the tightening member (5) ( 7) and
A bevel gear (14) as a drive member (8) meshing with a gear cutting portion of a threaded ring (7),
The recess for the transmission mechanism (11)
A recessed portion for the bevel gear (14) provided to be recessed from the outer wall of the mouth frame member (12) or the chuck body (3) in the radial direction of the clamping chuck;
A recessed portion for a threaded ring (7) provided from the inner wall of the frame member (12) or the chuck body (3) to be recessed in the radial direction of the clamping chuck,
The threaded ring (7) can be driven by a drive member (8) that can rotate around a drive shaft that is not parallel to the chuck shaft, and before the mouth frame member (12) and the chuck body (3) are assembled together. From the axial direction, it can be inserted into the recess for the threaded ring (7),
The bevel gear (14) has a through-hole for receiving a driving tool in the center, and is entirely frustoconical and has a thickness smaller than the diameter.
The outer cylinder (10) for the transmission mechanism is characterized in that its inner surface is abutted against the outermost part of the bevel gear (14), thereby fixing the radial position of the bevel gear (14). Fastening chuck.   The tightening according to claim 1, wherein the transmission mechanism outer cylinder (10) forms a cylindrical outer peripheral surface continuous with the outermost surface of the mouth frame member (12) or the chuck body (3). Chuck.   The fastening chuck according to claim 1 or 2, wherein the outermost portion of the bevel gear (14) is a portion along a through hole of the bevel gear (14). The opening (9) of the outer cylinder (10) for transmission mechanism and the through hole of the bevel gear (14) have the same diameter and are arranged coaxially. The fastening chuck described in 1 .   The clamping chuck according to any one of claims 1 to 4, wherein the transmission mechanism outer cylinder (10) is detachably fixed to the chuck body (3).   The axially extending portion of the transmission mechanism outer cylinder (10) partially or completely surrounds the chuck body (3) and / or the mouth frame member (12). The fastening chuck according to any one of to 5.   The fastening chuck according to any one of claims 1 to 6, wherein an end of the transmission mechanism outer cylinder (10) opposite to the centering hole (2) is flanged.   The fastening according to any one of claims 1 to 6, wherein the transmission mechanism outer cylinder (10) is formed separately from both the chuck body (3) and the mouth frame member (12). Chuck. The fastening chuck according to claim 1, wherein the mouth frame member is formed integrally with the tool spindle. 10. The clamping chuck according to claim 1, wherein the clamping member (5) is formed as a collet (18). 11. The clamping chuck according to claim 10, wherein the outer wall of the collet (18) is provided with a flange-like overhanging portion (19) spaced apart from the end of the collet (18) in the axial direction. The collet (18) has a collar-shaped ring portion (20) that can be inserted into the mouth frame member (12) at an end portion on the side of the mouth frame member (12). Tightening chuck. The collet (18) has a threading portion (4) for tightening, and the length of the thread is the length of the threading of the threading ring (7) engaged with the threading portion (4) for tightening. The fastening chuck according to claim 10, wherein the fastening chuck exceeds a length.

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